In the Middle Ages, Pseudo-Aristotelian Secretum secretorum was an exceptionally widespread text, both in Latin and vernacular versions. It was a thematically varied treatise, a kind of sum of knowledge, containing information from statecraft, natural sciences, medicine and health science. The main attention of the study is focused on the spread of this treatise in medieval Bohemia. It follows not only its manuscript preservation and its context, but also the milieu in which this text was received, or which parts were received in the given, specific milieu. An important theme is also the translations into Czech and the reception of this treatise in texts written in Czech., Pavlína Cermanová., and Obsahuje poznámky pod čarou